/** Copyright (c) 2003, 2015, Oracle and/or its affiliates. All rights reserved.* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.*********************/packagejava.lang;
importjava.lang.annotation.*;
/*** Indicates that a method declaration is intended to override a* method declaration in a supertype. If a method is annotated with* this annotation type compilers are required to generate an error* message unless at least one of the following conditions hold:** <ul><li>* The method does override or implement a method declared in a* supertype.* </li><li>* The method has a signature that is override-equivalent to that of* any public method declared in {@linkplain Object}.* </li></ul>** @author  Peter von der Ah&eacute;* @author  Joshua Bloch* @jls 8.4.8 Inheritance, Overriding, and Hiding* @jls 9.4.1 Inheritance and Overriding* @jls 9.6.4.4 @Override* @since 1.5*/@Target(ElementType.METHOD)
@Retention(RetentionPolicy.SOURCE)
public@interfaceOverride {
}

packagejava.lang;
importjava.lang.annotation.*;
importstaticjava.lang.annotation.ElementType.*;
@Documented@Retention(RetentionPolicy.RUNTIME)
@Target(value={CONSTRUCTOR, FIELD, LOCAL_VARIABLE, METHOD, PACKAGE, MODULE, PARAMETER, TYPE})
public@interfaceDeprecated {
Stringsince() default"";
booleanforRemoval() defaultfalse;
}

packageadvanced.Annotation;
/*** @author : Cyan_RA9* @version : 5.0*/publicclassDeprecated_ {
@Deprecatedpublicvoidf() {
System.out.println("这方法没啥屁用，不建议使用。你非要用当我没说。。。");
    }
}
classTest {
publicstaticvoidmain(String[] args) {
Deprecated_deprecated_=newDeprecated_();
deprecated_.f();
    }
}

@SuppressWarnings("explanation1", "explanation2", "explanation3", ......)
//双引号中的说明信息不同，达到的抑制警告效果便不同。

packageadvanced.Annotation;
importjava.util.ArrayList;
importjava.util.List;
/*** @author : Cyan_RA9* @version : 5.0*/@SuppressWarnings({})
publicclassSuppressWarnings_ {
publicstaticvoidmain(String[] args) {
Listlist=newArrayList();
list.add("");
list.add(1);
list.add(1);
inti;
System.out.println(list.get(2));
    }
}

packagejava.lang;
importjava.lang.annotation.*;
importstaticjava.lang.annotation.ElementType.*;
@Target({TYPE, FIELD, METHOD, PARAMETER, CONSTRUCTOR, LOCAL_VARIABLE, MODULE})
@Retention(RetentionPolicy.SOURCE)
public@interfaceSuppressWarnings {
String[] value();
}

packagejava.lang;
importjava.lang.annotation.*;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.SOURCE)
public@interfaceOverride {
}

packagejava.lang.annotation;
@Documented@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.ANNOTATION_TYPE)
public@interfaceTarget {
ElementType[] value();
}

packagejava.lang.annotation;
publicenumElementType {
/** Class, interface (including annotation interface), enum, or record* declaration */TYPE,
/** Field declaration (includes enum constants) */FIELD,
/** Method declaration */METHOD,
/** Formal parameter declaration */PARAMETER,
/** Constructor declaration */CONSTRUCTOR,
/** Local variable declaration */LOCAL_VARIABLE,
/** Annotation interface declaration (Formerly known as an annotation type.) */ANNOTATION_TYPE,
/** Package declaration */PACKAGE,
/*** Type parameter declaration** @since 1.8*/TYPE_PARAMETER,
/*** Use of a type** @since 1.8*/TYPE_USE,
/*** Module declaration.** @since 9*/MODULE,
/*** Record component** @jls 8.10.3 Record Members* @jls 9.7.4 Where Annotations May Appear** @since 16*/RECORD_COMPONENT;
}

packageadvanced.Annotation;
importjava.lang.annotation.*;
/*** @author : Cyan_RA9* @version : 2.0*/@Documented@Retention(RetentionPolicy.SOURCE)
@Target(ElementType.METHOD)
public@interfaceDemo {
//自定义一个注解类。}

packageadvanced.Annotation.test;
importadvanced.Annotation.Demo;
/*** @author : Cyan_RA9* @version : 1.0*/classTest_EX {
@Demopublicvoidgreet() {
System.out.println("Hello!");
    }
@Demopublicvoideat() {
System.out.println("美汁儿美汁儿~");
    }
}